It’s not clear what prompted the outburst, which references a detective from Line of Duty played by Compston, who is a well-known Celtic supporter.

Compston screenshotted the bizarre outburst and posted it on his Instagram page saying: “That escalated quickly. Welcome Chrissy hope you like pictures of my dog otherwise between ones of DS Arnott and ‘fenians’ celebrating could be a tough follow for ye pal!”

The social media user attacked Compston unaware of the backlash

Compston’s fans then piled in on “Chrissy”.

In a remark, described by others as “comment of the century”, Jenniferholmes297 said: “Who is this f***** pleb? Jog on chrissy you hoofw*****g bungle c***. We love you @mrmartincompston.”

Hannahsang91 said: “Proper mugged him off.”

Neillferguson75 added: “What a t**t there is no need, however nice reply.”